I start emacs from a xterminal and try to close it from file->exit emacs
the whole x system crashes, the mouse and the keyboard doesn't work. I have
to kill the X system loging in from another machine, and kill the x system.
If I close emacs form the x button on the frame of the window everything
This is probably a problem with the font server - make sure
you update to the latest errata X RPMs.